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![\"Alignment](\"http:\/\/dc2wk.schwab-intra.net\/wp-content\/uploads\/2015\/07\/Alignment-under-side.jpg\")
\n<\/a>The interesting alignment points on the under side<\/p>\n
The TS-780DX can not use FM with modern radios together! Its an very old FM standard The SSB ist very good, for that the radio was build The Frequency is drifting with the temperature of this radio very high. I measure a difference from 700 Hz!\u00a0So you can try to get it better. But with the temperature in your room, the frequency is changing. We have in Germany a proverb: “Sie l\u00e4uft wie ein Feldhase” Translation “It runs like a hare” \ud83d\ude42 With this crystals the frequencies are: If I get the right color, I will paint the case new with Sommerkamp blue.<\/p>\n
\n<\/a>The interesting alignment points on the upper side<\/p>\n<\/a>
\nAM\u00a0modulation factor, at 60% the modulation<\/p>\n<\/a>
\nis clear with a 1kHz sine wave. More AM modulation will disturb the modulation<\/p>\n
\nwhat use the 1.5 KHz filter from SSB. That does not working very well.
\n<\/a>
\nFM\u00a0frequency deviation, 1.5KHz. That’s the max what this filter can handle
\nIf you adjust more, the the FM Mod is strong\u00a0disturb.<\/p>\n<\/a>
\nFM\u00a0modulation clearness. They are still spikes on the sine. And so it sounds.
\nBut it works not better, without a big modification.
\nYou can try to get the FM receiving clearer with the FM filter (see upper side alignment pictures at the left side).<\/p>\n
\n<\/a><\/a>
\nTwo tone Test in SSB, looks very good so far. If this is not clear, see at the bias and the ALC.<\/p>\n<\/a>
\nThe maximum power in SSB, 100W, on FM 45W and on AM 20W with upward modulation to 50W<\/p>\n
\n<\/a>
\nAM\/FM Frequency, that 10 Hz to high. very good<\/p>\n<\/a>
\nThe SSB frequency I check with a 1Khz test tone. So that frequency is the offset<\/p>\n<\/a>
\nUSB Frequency is 30 Hz too low. Good enough.<\/p>\n
\n<\/a>LSB Frequency is 130 Hz too high.\u00a0it will works. You will not often use LSB<\/p>\n<\/a>
\nFront view with open case<\/p>\n
\n<\/a>upper side inside with the main board
\n<\/a><\/p>\n<\/a>
\nunder side inside with the VXO<\/p>\n<\/a>
\nFront view
\n<\/a>
\nSelf made mike with volume control<\/p>\n<\/a>
\nin action \ud83d\ude42<\/p>\n
\n<\/a><\/p>\n
![\n<\/a>](\"http:\/\/dc2wk.schwab-intra.net\/wp-content\/uploads\/2015\/07\/max-Output.jpg\"){kind=link}